Improvement in shutter-fastenings



J H CLARK Shutter-Fastenings.

Patented-Jan. 15,1878.

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MQM (Kw UNITED STATES PATENT OEEIoE.

JOSEPH 'H. CLARK, OF D-EEBING, MAINE.

'l MPROVEMENT IN SHUTTER-FASTENINGS.

Specification forming part of Letters Patent N0. 199,262, dated January 15, 1878; application filed February 20, 1877.

To all whom it may concern:

Be it known that I, JosEPH H. CLARK, of Deering, in the county of Cumberland and State of Maine, have invented a new and useful Improvement in Shutter or Window-Blind Fastenings, which improvement is fully set forth in the following specification and accompanying drawing, in which Figure 1 is a side view of the blind-fasteners in position for use. Fig. 2 is an end view of the double-vibrating catch, and Fig. 3 is a sectional view of the same;

The object of my invention is to provide a simple, serviceable, and inexpensive shutterfastening device, in which the catch is not held rigidly, but has a double-vibratin g motion, enabling the catches to hold at an angle of less than ninety degrees; and to this end my invention consists in the novel combination and arrangement of a loosely-hung bent lever, countersunk near the middle, pivoted at two points, and provided with double-vibrating catches, there being, also, a light, loosely-attached round wire spring, and suitable staples for the vibrating catches to engage with, all as hereinafter more fully described and claimed.

The bent lever a and the spring 8 are not held together rigidly by the supporting-screws d d, so that when any strain is applied to the double-vibrating catches a a in the staples e c it will make the fastener incline to afirm hold upon the staple e, and increase the firmness according to the strength applied. Or if the bent lever a should be placed in a vise and straightened on a line with the short bar of the same, (which may be done,) the catches a a would present a hooked form, indicating the manner in which they will hold, thus making the fastener self-acting horizontally in the above-named way. v

In the drawings, a is the fastener, cast crooked, forming a loosely-hung bent'lever, so that the catches a a are double-vibrating, and hold on to the staples 0 eat an acute angle. 8 is a loosely-attached spring. d d are supporting-screws.

Two screws are necessary for each fastener, one for a pivotal hinge and the other for a side support, the bent lever being countersunk at a.

The operation of my device is simple, and will be easily understood by examining the double-vibrating catches in connection with the loosely-hung countersunk bent lever and the supporting-screws.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

.An improved shutter or window-blind fastening, consisting of the loosely hung bent lever a, countersunk at a pivoted at d and d, and provided with the crooked double-vibrating catches a? a in combination with the loosely-attached spring 8 and staples e 0, sub stantially as shown and described, for the purpose specified.

JOSEPH H. CLARK.

Witnesses:

N. SMART, W. A. CLARK. 

